Belt-tightener.



-T. F. PHILIPPI.

BELT TIGHTENER.

APPLICATION FILED SEPT. 25', 1913.

1,125,880, Patehted Jan.19,1915.

2 SHEETS-SHEET 1.

mvmtox z Lmmnm Abb'is THE NuRRIs PETERS CO. F'I4OTC-LITHO. WASHINGTON u c.

T. F. PHILIPPI. BELT TIGHTBNER.

APPLIOATION FILED SEPT. 25. 1913. 1,125,880. Patented Ja11.19,1915.

2 SHEETS-SHEBT 2.

"HE NORRIS PETERS cu. PHOTGLITHQ. WASHINGTON, D. C

a citizen of-the United States of THEODORE r. rI IIIIrrI, or East. s1 LoUIs, ILLINOIS.

ToaZZ whom it mag concern:

Be it known that-I, Tr-rnooonn F..Pnn.n rr,

and aresident of East, St. Louis,county f St. Clair, and State of Illinois, havemvented. certain new and useful Improvements in BeltTighteners,' of which the folthe movable. bearing frame and the i provided with a lowing is a full, clear, and exact description, reference being had to theaccompanying drawings, forming apart of this specifica- 131011- My invention relates to a belt-tightener,.

the main object being to. provide means whereby a belt. driven machine may be easily and quickly stopped and started.

, Figure I is a front elevation, partly broken away, showing a grinding machine embodying the features of my invention. Fig. II is a side elevation, partly in section. Fig. III is an enlarged top or plan view of a portion of the machine, showing the guides forjthe movable bearing frame. Fig. IV is an enlarged vertical section illustrating means for moving said bearing frame.

In the accompanying drawings: A designates a support in the form of a casing, and B designates bearing frames fitted to said support. Each bearing frame comprises bearings 1 and 2 connected by an arm 3, and a depending wing 4 slidably fitted to the casing A. The connecting arm 3 extends through a slot 5in the upper portion of the casing. The depending wing 4 is fitted to 1 guides 6 at the side of the casing, see

Fig. III. 1

Each bearing frame supports a shaft 7 pulley 8 and a grinding wheel 9, the phlley being located between the bearings 1 and 2. 1O designates a motor located in the casing A and having a pair of drive pulleys 11. 12 designates drive belts passing around thepulleys 8 and 11.

l/Vhen the motor is in operation the grinding wheels may be driven by raising the bearing frames so as to tighten the drive belts onto the pulleys 8 and 11 and the grinding wheels may be stopped by lowering the bearing frames to loosen the belts as shown most clearly in Fig. II. It will be noted that the belt 12 shown in Fig. II is released from the motor pulley 11. When a bearing frame occupies its lowered position the pulley 8 carried by the bearing frame engages a brake shoe 13 located between the pulley and the connecting arm 3.

' Specification of Letters Patent.

- Application filed September 25 1913.

America,

rigid cam sh aft BELT-TIGHTENER.

I Patented Jan. 19, 1915. Serial No. 791,756. i

The brake shoe is supported by a'holder 14L strad'dling,the connecting arm 3 and seated on aplatform 15.1 V.

Each bearing frame is associated'with a lifting andclamping devioecomprising a 16 secured to the casing A and extending through a slotul'l in the lower end of the depending wing 4, and a cam 18,1oose on said'cam shaft. The slot 17 is preferably formed in the lower edge of the. wing 'b to ipermitltheremoval of the bearing frame and its wing while the rigid shaft 16'is secured to cam is preferably in the form of an eccentric engaging the wing 4c and arranged between upper and lower projections 19 and 20 on the wing. '21 designates a clamping nut screwed onto the outer end of the cam shaft, said nut having notches 22 for the reception of a wrench 23 which surrounds the cam shaft. A second wrench 24 also surrounding the cam shaft has its handle 25 arranged between lugs on the cam 18. The wrenches 23 and 24 are separated by a collar 26.

The bearing frames may be raised and lowered by turning the cams 18 and when a bearing frame is elevated to tighten the belt carried thereby, the nut 21 is rotated to clamp the depending wing at onto the casing A and at the same time clamp the cam onto the wing 4. The bearing frame is then firmly held in its elevated position and the drive belt is tightly fitted to the pulleys.

I claim 1. A machine of the character described comprising a support, an eccentric shaft secured to said support, a vertically movable bearing frame having a depending wing formed with an abutmentand with a slot through which the eccentric shaft projects, an eccentric fitted to the outer face of the casing A. The I said depending wing and rotatably mounted on the eccentric shaft, said eccentric being adapted to engage said abutment, means for said wing and secured to said support, an

ing said eccentric onto the outer face of said i wing, said eccentric being located directly between the nut and the wing, and means for rotating said eccentric. I

3. A machine of the character described comprising a support provided with a pair of guide bars, a bearing frame having a slotted wing the side edges of which are siidably fitted to said pair of guide bars, an eccentric shaft passing through the slot in said wing and secured to said support,

; said slot being formed in the lower edge of Copies of this patent may be obtained for said wing to permit the removal of the bearing frame and its wing whlle the eccentric "shaft is secured to said support, an eccentric fitted to the outer face of said wing and r0: tatably mounted on said eccentric shaft,

upper and lower projections formed on, said wing at points near the opposite, ends of said slot, a nut on said eccentric shaft for clamping said eccentric onto the outer face of said win thereby clamping i-said wing to said support, and means for rotating said eccentric between said upper and lower pro jections whereby the bearing frameis raised and lowered. a

THEODORE EPHILIPPI. In the presence of E. K. CLARK, E. B. LINN.

five cents each, by addressing the Commissioner of Patents,

Washington, D. G. 

